Fermented Pickle Salt Calculator
Pickle brine salt and kraut ratios by weight.
What it does
Fermentation lives or dies on salt math: too little invites mush and spoilage, too much stalls the lactobacillus that sours the batch. Brine percent and kraut ratios pin the safe middle.
The tool above runs brine mode by water and percent, or kraut mode by cabbage weight, in imperial or metric. It returns salt grams with cup or spoon measures.
The default gallon at 5% needs 189 g, about 0.8 cup. The kraut case of 5 lb cabbage needs 51 g, about 2.8 tablespoons at 2.25%.
NCHFP pickling guidance brackets dill brines near 5% with dry kraut salt near 2.25%, always with pickling salt, never iodized. Pickling salt near 240 g per cup ties gram precision to familiar cups.
Salt starts the ferment; temperature and submersion finish it. Keep vegetables under brine at 65 to 75 F, skim kahm yeast, and compost cloudy or pressurized failures.
How to use
- Pick brine or kraut mode.
- Type water or cabbage weight.
- Set brine percent for brines.
- Read salt grams first.
- Read cups or spoons beside it.
- Read strength last.
Formula
- pct
- Brine strength percent, default 5.
- water
- Water in gal or L.
- cabbage
- Cabbage in lb or kg.
NCHFP pickling guidance salts dill brines near 5% with half sours lower and salt stock higher, and dry salts kraut near 2.25% (3 tablespoons per 5 lb). Pickling salt near 240 g per cup links the gram math to the classic 3/4 cup per gallon. Iodized salt stays out for clarity and ferment health.
Worked example
Example: 5% gallon brine
Imperial defaults: brine mode, 1 gal, 5%.
- Batch: 1 gal water at 5% brine.
- Salt: 3.785 x 1000 x 0.05 = 189 g.
- Cups: 189 / 240 = 0.8, about 3/4 cup.
- Check: 0.75 cup x 240 = 180 g, near 5%.
- Metric: 3.79 L needs 190 g, about 187 mL.
- Tool shows 189 g, about 0.8 cup, 5% brine.
Reference table
| Batch | Salt | Measure |
|---|---|---|
| 1 gal at 5% | 189 g | about 0.8 cup |
| 2 gal at 5% | 379 g | about 1.6 cups |
| 5 lb kraut | 51 g | about 2.8 Tbsp |
| 3.79 L at 5% | 190 g | about 187 mL |
Limits
- Planning ratios; taste and temp vary.
- Pickling salt density assumed.
- Kahm vs mold judgment needed.
- Salt stock strengths separate.
Common mistakes
- Using iodized table salt.
- Eyeballing cups for big batches.
- Starving brine under 2%.
- Fermenting hot past 80 F.
- Sealing active ferments tight.
Try it yourself
Quick checks. Answers sit tucked under each question.
2 gal at 5%?
379 g, about 1.6 cups, at 5% brine.
10 lb cabbage kraut?
102 g, about 5.7 Tbsp, at 2.25% dry salt.
0 gal?
Zero water brines nothing: enter water above 0.
Questions
Which percent?
Salt percent of water weight for brines: 3.5 half sour, 5 dill, higher for salt stock. Kraut salts cabbage at 2.25%.
Which salt?
Pickling or canning salt, never iodized: iodine clouds brine and slows ferment.
Grams per cup?
About 240 g per cup for pickling salt. Brands vary, so grams rule and cups follow.
Kraut ratio?
3 tablespoons per 5 lb shredded cabbage, worked until juices run.
Ferment rules?
Keep veg submerged, skim kahm, and ferment 65 to 75 F for weeks, tasting along.
Spoilage signs?
Cloudy brine, pressure lids, and off smells mean compost, not canning.